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maintenance free battery (mf)

A maintenance free battery, MF, is normally a wet battery where the design keeps gassing to a minimum and includes a battery box that is sealed to keep the gases in place. An ample amount of acid means the fluid can last for the entire service life of the maintenance free battery without being topped up. Development has been made in three stages. Twenty years ago, the high antimony battery dominated the market where the basic element antimony was added to the grid, primarily to rationalise manufacture. The refined production method saw the introduction of hybrid batteries with the antimony on the negative plate being replaced by a calcium alloy which substantially reduced gassing and thereby water consumption.

 

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